Abstract: A pressurized extinguishant release device with a rolling diaphragm includes a closed elongated sensor tube filled for example with 50% water and 50% ethylene glycol which terminates in an enclosure sealed by a circular head portion of the rolling diaphragm. On the other side of the head portion is a piston connected to a penetrator retained against the diaphragm by a shear pin. The penetrator is positioned above a brittle membrane which encloses a pressurized extinguishant. Heating of the liquid filled sensor tube to a certain temperature will cause a vapor pressure to push against the diaphragm head to cause the shear pin to fail propelling the penetrator into the membrane and thus allow the extinguishant to flow.

Abstract: A high-speed serrodyne digital frequency translator utilizes a digital phase-shifter, for example, of series coupled Schiffman type cells, which have reference and delay paths which are switched by three-terminal devices of the gallium arsenide FET type. No bias voltages are used and the FETS are driven by the output of a binary divider network which in turn is composed of GaAs FETS as active elements. Thus switching in the picosecond range results.

Abstract: A microwave integrated circuit for frequency translation includes a pair of mixers for receiving the input RF signal, mixing it with a pair of quadrature frequency modulation signals and by combining the output of the mixers in a quadrature coupler, suppressing all signals except for the input RF signal plus the modulation frequency. This is accomplished in an environment of high "g" forces, significant temperature variations and a need for high reliability and fast operation by a miniaturized microwave integrated circuit having microstrips on the top and bottom sides of a ceramic substrate. The mixers consist of quad diode chips which are compression welded to one side of the microstrip for good resistance to high "g" forces. Suitable balancing is provided by use of a ground plane on the opposite side with tapering. A quadrature coupler to suppress the lower sideband is in the form of a LANGE coupler which is effectively integrated on the top side of the substrate.

Abstract: A Class A high power amplifier having an operating frequency in the range of less than substantially 2 GHz and suitable for aircraft use, is all solid state in that gallium arsenide field effect transistors are utilized. These are mounted in a large copper heat sink which is air cooled to provide for overall cooling by conduction and convection. By the use of microstrip matching circuits, the relatively low impedance of the gallium arsenide FET units is matched to the required higher system impedance. At the same time a 40% band-width is provided due to the superior matching.

Abstract: A pneumatic pressure detector for use in an overheat or fire alarm system utilizes a known capillary type sensor tube which has absorbed in it a gas. Overheat or fire condition causes the gas to expand which then actuates an associated deformable diaphragm to close an electrical switch. To insure that the system pressure is maintained and no fault condition exists, the compact detector also uses a deformable diaphragm associated with an integrity switch which opens if the pressure falls below normal. Both of these diaphragms are juxtaposed to form the plenum to which the sensor tube is attached thereby saving weight and space.

Abstract: A linear fire extinguisher includes a high strength metal elongated tube containing a pressurized fire extinguishant such as Halon 1301. A pair of these tubes are mounted opposite each other with a pair of opposed shaped charges placed along exterior walls opposite each other so that when actuated they provide cutting lines which release the extinguishant in opposed directions so that reaction forces balance out. Concurrently the unwrapping of each container is counteracted and interfered with by the adjacent container to minimize the spread of container fragments. Appropriate intermediate retention of portions of the container is provided to also minimize fragments.

Abstract: A linear fire extinguisher of the type containing superpressurized Halon in a cylindrical container which is cut by an explosive linear shaped charge is contained in an overall housing which, in addition to preventing fragments from escaping, diverts the outflow of extinguishant to provide an equal and opposite reaction force to the momentum force of the outflow. In addition, the diversion occurs through apertures in the housing to opposed paths in directions substantially perpendicular to the reaction forces to again, nullify any forces due to this perpendicular outflow. The invention is also applicable to other container configurations where a high impulse force might occur.

Abstract: An accelerometer based power control apparatus for use in an aircraft subsystem (where the subsystem may be a fire extinguishing system) utilizes an independent battery source. The battery is connected to the aircraft subsystem only during the flight of the aircraft by a positive indication of an associated accelerometer which closes a switch connecting the battery to the aircraft subsystem.

Abstract: The velocity deception apparatus utilizes a serrodyne technique to produce various deception jamming modes. The modes are all controllable by parameters which are digitally stored and in addition, the modes may be selectively actuated by a remote control panel located in the aircraft on which the apparatus is installed. All of the foregoing is accomplished with low cost, reliability, simplicity and with flexibility of operation in being able to digitally reprogram the apparatus on an ongoing basis.

Abstract: A servo type accelerometer including a main support base, a pendulum assembly and a servo arrangement is disclosed herein. The pendulum assembly includes a pendulum and means supporting the pendulum for limited rotational movement through a normal resting plane about a fixed axis within that plane and relative to the base in response to and as a result of the pendulum being subjected to acceleration forces normal to the resting plane. The servo arrangement cooperates with the pendulum for monitoring the presence and magnitude of these acceleration forces, if present. A particular feature of the accelerometer disclosed resides in specifically designed flexures for supporting the pendulum and a technique for preventing these flexures from being placed in a state of compression and possibly being damaged thereby.

Abstract: Servoed accelerometer with isolated voltage torquing having first and second grounds, a servoed accelerometer having a torque coil, and an amplifier for driving said torque coil. The amplifier has inverting and non-inverting junctions. The second ground is coupled to the non-inverting junction of the amplifier. A torque signal supply is coupled to the first ground. A transformer is provided for coupling the torque signal supply to the non-inverting junction of the amplifier and serves to isolate the torque signal supply from the non-inverting input of the amplifier so that the amplifier and polarity of the torque signal are preserved.

Abstract: A transmission line analyzer for automatically identifying the severities and locations of multiple mismatches generates a ripple waveform which is digitally analyzed by a fast fourier transform method. Foreign and harmonic signals are rejected, and return loss at each mismatch accurately determined.

Abstract: A stable, low noise voltage-to-current converter is provided to control the tuning current in YIG tuned devices such as YIG tuned transistor oscillators. The circuit provides stable tuning current which is substantially noise free.

Abstract: An angular rate instrument adapted for mounting to a given object for measuring the rate of turn of the latter is disclosed herein. This instrument utilizes an angular accelerometer to sense angular acceleration to which the instrument is subjected and a circuit for integrating the difference between this signal and a reference signal to produce an integrated output signal corresponding to the rate of turn of the object. The angular rate instrument also utilizes a null circuit for producing the reference signal in response to and dependent on low frequency error signals which appear at the output of the signal integrating circuit. The null circuit uses a capacitor to provide the reference signal and means for maintaining the charge on the capacitor during power interruptions so as to prevent losing the reference signal as a result of such interruptions.

Abstract: A pendulous type of oil filled accelerometer is disclosed herein, specifically one which is sensitive to temperature changes sufficient to introduce a temperature related error into its output signal, if left uncorrected. A technique which compensates for these temperature changes in order to reduce the resultant error to an acceptable level is also disclosed herein. This technique uses the oil itself, specifically its sensitivity to changes in temperature resulting in changes in its density, in combination with an expandable/contractible bellows.

Abstract: A new microprocessor controlled digital multimeter offers significant advantages to the user. Automatic calibration allows a new reference IC board to be inserted and because of such calibration the multimeter is instantly ready for use.

Abstract: A dot connecting technique for the digital display of a spectrum analyzer generates vertical connecting lines between points by inhibiting the horizontal scan during such generation for a time period proportional to the vertical distance between dots to thereby provide connecting lines of constant intensity.

Abstract: A base line clipper for a spectrum analyzer display uses a five position momentary switch to move the base line in the up or down directions in either a fast or slow mode. This is especially useful in conjunction with the spectrum analyzer which has a variable scan time because of its dot connecting technique.

Abstract: A pendulous type of accelerometer is disclosed herein and includes a sealed housing defining an oil filled internal chamber, a pendulous member located within the housing chamber and a pair of bearing mechanisms for pivotally supporting the pendulous member. The accelerometer also includes an assembly associated with each of the bearing mechanisms for preloading the latter, each of which includes two preload arrangements, a first or inner arrangement and a second or outer arrangement. The inner arrangement is provided for applying and adjusting a preload force against its associated bearing mechanism before the housing is assembled and its chamber is filled with oil and sealed and the outer arrangement is provided for further adjusting the applied preload force from outside the housing after the latter is assembled and its inner chambers filled with oil and sealed.

Abstract: A microprocessor monitor or analyzer used as a test and troubleshooting tool for both the software and hardware of microprocessor based equipment. The analyzer is usable with all microprocessor families having accessible or reconstructible address and data busses up to 16 bits wide each. It has search modes that find and identify the first and last instruction in a program loop. A transfer mode permits stepping forward or backward through programs without setting addresses. It can be used as a passive real time address and data bus monitor or as an interactive break point generator. After a match address is encountered, strobing and storing of the address and data bus content can be delayed by a preset number of machine cycles, instruction cycles, loop cycles (loop being the repetitive execution of the same instruction) or combinations of these delays. After a halt or break, the processor can be stepped in single or multiple step increments according to the above cycles.